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Re:Reddit bans The Atlantic, Businessweek, others in major a... by brc on Thursday June 14, 2012 @03:34AM (#4110258)
Yes exactly.

If you're going to have slug-type Urls, they should at least be unique, and if they do change, the old version should at least show a canonical link and/or 301 to the new one.

Usually this means keeping a record of every variation the Url has ever been for a piece of unique content.

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